ADVENTURE COMICS #97, 1945. Very dynamic S&K cover of Sandman and Sandy facing off against aliens.
HOUSE OF MYSTERY #79, 1958. The monster on this cover is kind of weak, but the foreground figure is nice, with some nice inking from that period.
DEFENDERS, THE #43, 1977. Al Milgrom inks, with a nice big Hulk figure. Kirby drawing Doc Strange always looks a bit wrong, though.
Holy Cow – the Defenders cover – Kirby was master at creating such a powerful piece! The fact that he was equally successful with Romance and even funny animal stuff keeps me in awe, even all these years later.